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| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2018-12-27 22:50:19 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-01-05 17:37:37 +0100 |
| commit | a4b475b1abbb41b71d62e088a1ffd2b86e5e0aa0 (patch) | |
| tree | 979f7d547a87a0171fadc1c2eee5eafb51e3e93c /Documentation/devicetree | |
| parent | dt-bindings: iio: adc: Add docs for AD7606 ADC (diff) | |
| download | linux-a4b475b1abbb41b71d62e088a1ffd2b86e5e0aa0.tar.xz linux-a4b475b1abbb41b71d62e088a1ffd2b86e5e0aa0.zip | |
dt-bindings: iio: adc: meson-saradc: update temperature sensor support
Meson8b and Meson8m2 use a 5-bit wide TSC (temperature sensor
coefficient). The SAR ADC registers however can only store (the lower)
4 bits. The fifth (upper-most) bit is stored inside the
MESON_HHI_DPLL_TOP_0[9] register from the HHI register area.
This adds a syscon property to the HHI register area so a driver can
fetch the HHI register map and store the fifth TSC bit in there.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt index 325090e43ce6..75c775954102 100644 --- a/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt +++ b/Documentation/devicetree/bindings/iio/adc/amlogic,meson-saradc.txt @@ -23,6 +23,10 @@ Required properties: - #io-channel-cells: must be 1, see ../iio-bindings.txt Optional properties: +- amlogic,hhi-sysctrl: phandle to the syscon which contains the 5th bit + of the TSC (temperature sensor coefficient) on + Meson8b and Meson8m2 (which used to calibrate the + temperature sensor) - nvmem-cells: phandle to the temperature_calib eFuse cells - nvmem-cell-names: if present (to enable the temperature sensor calibration) this must contain "temperature_calib" |